Luyten 678-39


Catalog numbers:
     Gliese (Gl) 357, Luyten Half-Second (LHS) 2157, Hipparcos Input Catalog (HIC) 47103, Luyten (L) 678-39
Arity: singular
Right Ascension and Declination: 9h36m1.661s, -21°39'38.19" (epoch 2000.0)
Distance from Sol: 29.3 light-years (8.98 parsecs)
Standard error in distance: 1.75%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -22.0, 16.0, -10.8
Galactic (X,Y,Z) coordinates in ly: -7.25, -26.1, 11.1
Proper motion: 0.915 arcsec/yr (169.4° from north)
Radial Velocity: -78 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 48.3, 52.9, -49.6

What do all these fields mean?

Spectral class: M3
Luminosity Class: V
Apparent visual magnitude: +10.91
Absolute visual magnitude: +11.15
Visual luminosity: 0.0030 x Sol
Color indices: B-V= +1.57, U-B= +1.18, R-I= +1.00
Comfort Zone (visual): 0.055 A.U.s

but not more than light-years away
Data for this star system were most recently updated on 4-April-2001.